Siren construction



Feb. 25, 1958 M. J. BIRD SIREN CONSTRUCTION Filed May s, 1956 FIG.|

INVENTOR MARTIN J. BIRD ATTORNEY United States Patent '0 SIREN CONSTRUCTION Martin J. Bird, Auburn, Mass., assignor to Persons- Majestic Mfg. Company, Worcester, Mass., a corporation of Massachusetts Application May 8, 1956, Serial No. 583,445 4 Claims. (Cl. 116-147 This invention relates to a new and improved siren construction particularly adapted for childrens vehicles or for use as a toy and including a strong but light and inexpensive sirenadapted to be operated by hand as for instance by a hand crank and usable on bicycles, carts, toy automobiles, etc.

Other objects of the invention include the provision of a toy siren principally for juvenile use and comprising a truncated teardrop-shaped housing having a large open end and an opposite smaller end, said housing being provided with an internal annular shoulder circumferentially thereof located close to the open end of the housing and forming an abutment for a circular mounting plate or disc journalling the siren fan, there being a gear mounting construction attached to said disc and extending oppositely therefrom with respect to the fan toward the a fastening and locating screw at the small end of the housing being threaded into said cross plate and drawing the mounting plate firmly against the shoulder above described, said rearwardly extending plates being provided with a crank and journaling the same, said crank being engaged with the gearing for turning the fan at a high rate of speed to produce the desired level of sound.

Other objects and advantages of the invention will appear hereinafter.

Reference is to be had to the accompanying drawings, in which:

Fig. 1 is a longitudinal cross sectional view illustrating the invention;

Fig. 2 is a view in front elevation thereof, parts being in section;

Fig. 3 is a section on line 33 of Fig. 1;

Fig. 4 is an elevational view, looking in the direction of arrow 4 in Fig. 3;

Fig. 5 is a section on line 55 of Fig. 4; and

Fig. 6 is a sectional view illustrating a mounting for the device.

The invention comprises a housing generally indicated at 10, said housing being in the form of a truncated teardrop and having a large open end 12 preferably closed by a detachable louvered cover 14. This housing has a smaller end indicated at 16 and a depressed conical terminal portion 18 therein receives a countersunk threaded screw 20 for a purpose to be described.

The housing is cylindrical in section as shown in Fig. 2 and is provided with an annular depression as at 24, said annular depression forming an internal shoulder which is located close to but spaced from the open edge 12 of the housing.

A circular mounting disc or plate 26' is disposed within the housing to abut the shoulder, and this plate centrally thereof journals the shaft 28 which mounts the fan 30, the fan being largely conventional and operating to rotate at a high rate of speed past apertures at 32 in the housing in order to produce the desired sound.

Extending rearwardly from the mounting disc or plate 26, there are a pair of like elongated spaced mounting the internal shoulder formed by the indentation 24. This' smaller end of the housing and including a cross plate,

plates 34, 36. These plates are mounted on plate 26 by any desired means such as peening as indicated at 38. The elongated plates 34 and 36 are each provided with a bent up apertured tab 40 and in the plate 36 this provides a journal for the other end of the fan shaft 28 as clearly shown in Fig. l. The tab 40 on the plate 34 is not used but the two plates 34 and 36' may be made in a single stamping die.

At the ends of the elongated plates 34 and 36 opposite from the mounting plate 26, there is a cross plate 42 which is attached to the plates 34 and 36 by any desired means such as pinions as shown. The screw 30 is threaded into this plate and therefore it will be seen that by turning the screw 20 in the usual manner, the mount-.

ing disc or plate 26 will be snugly and firmly held against locates and secures all the moving parts.

The gearing depended upon to rotate shaft 28 and the fan at a high rate of speed is generally indicated as comprising a hand crank 44 which extends through an opening 46 in a side wall of the housing and is journaled at 48 in plate 36', preferably extending also through plate 34 as indicated at 50. This shaft is provided with a large pinion 52 meshing with a small pinion 54 turning a gear 56 on shaft 58 and this gear in turn is meshed with a small gear 60 on the fan shaft 28.

The various gears may be pressed onto their respective shafts in a manner well known in the art and the fan 30 is secured to the shaft by pressing a member 62 onto a knurled end portion 64 of the shaft. Shaft 28 is also knurled at 66 and the gear 60 is pressed thereto as will be clear to those skilled in the art.

Any form of supporting means such as a bracket 68 may be used to mount the siren in place on a cart or vehicle such as indicated at 70. However, a double type of bracket 72, 74 may be utilized to secure the siren to a rod or tube support such as a handle bar of a bicycle or other similar vehicle as indicated at 76.

It will be seen that this invention provides a practical inexpensive but rugged hand-operated siren particularly adapted for juvenile use. The screw 20 firmly locates all of the moving parts with respect to the housing and thus correctly positions the fan with respect to the openings 32 in the housing as above described in order to achieve the sound effect desired. The gearing is inexpensive and such as to provide for rotation of the fan at the high speeds necessary, and the manufacture and assembly of the device is relatively simple and inexpensive, so that the device may be provided at a relatively low price.

Having thus described my invention and the advantages thereof, I do not wish to be limited to the details herein disclosed, otherwise than as set forth in the claims, but what I claim is:

1. A siren comprising a tapered housing having a large open end and a small end, means forming a substantially continuous shoulder located on and interiorly of the housing spaced inwardly from but relatively close to the large open end of the housing, a cover member, means to attach the latter to the housing at the open end to close the same, a mounting plate in the housing, means on the plate abutting the shoulder at spaced points thereon, a pair of spaced, elongated plates attached at corresponding ends to the mounting plate and extending toward the small end of the housing, a cross plate attached to the elongated plates at the ends of the latter remote from the mounting plate, said cross plate connecting the elongated plates together in spaced relation, gearing mounted on the elongated plates, means engaged with and operating the gearing, a siren fan in the housing, a shaft for the fan, the shaft being connected to the gearing and driven thereby, and means located at the small end of Patented Feb. 25, 1958.

the housing connected to the cross plate and locating and securing the same and the elongated plates, and therefore the gearing in position in the housing.

2. The siren of claim 1 wherein the last-named means is effective to draw. the mounting plate tightly against the shoulder.

3. A siren comprising a tapered housing having a large open end and a small end, means on the housing forming a substantially continuous shoulder interiorly of the housing, said shoulder being spaced inwardly from but relatively close to the large open end of the housing, a cover member, means on the cover for attachment to the housing to close the open end thereof, a mounting plate in the housing, said plate having end positions abutted against the shoulder at spaced points thereon, a pair of spaced, elongated plates attached at corresponding ends thereof to the mounting plate and extending toward the small end of the housing, a cross plate attached to the elongated plates at the other ends thereof and connecting the elongated plates together in spaced relation, gearing mounted on the elongated plates, means connected to and operating the gearing, a siren fan at the opposite side of the mounting plate from the elongated plates and the gearing, a fan shaft for the fan, said shaft extending through the mounting plate, said gearing being connected to the shaft to rotate the same and the fan, means on one elongated plate journalling the fan shaft, and means to secure the elongated plates in position in the housing, said means securing the mounting plate and fan.

4. The siren of claim 3 wherein said last-named means is a screw-threaded element engaged with the cross plate, and acting to draw the mounting plate to the shoulder to centrally locate the fan with respect to the housing adjacent the large end thereof.

References Cited in the file of this patent UNITED STATES PATENTS Seiss Sept. 24, 1935 Persons Jan. 13, 1948 

